c# - TemplateColumn doesn't diplay the Header in DataGrid -

i made in datagrid templatecolumn structure:

<datagridtemplatecolumn header="squadra" width="sizetocells" isreadonly="true" headerstringformat="squadra">       <datagridtemplatecolumn.celltemplate>           <datatemplate>                 <stackpanel orientation="horizontal">                        <image maxheight="20" maxwidth="20" source="{binding path= 'cresturl' , converter={staticresource nametoimageconverter}}" />                         <textblock text="{binding name}" />                 </stackpanel>            </datatemplate>       </datagridtemplatecolumn.celltemplate> </datagridtemplatecolumn> 

but header "squadra" insn't visible when start solution, if populate datagrid through code header became visible. bug of wpf or wrong?

i think 's because column visible width of 0 (sizetocells , no content).

set minwidth="150"